US1491986A - Coupling for drill pipes - Google Patents

Description

April 29, 1924.,

L.H.GREENE COUPLING FOR DRILL PIPES Filed Feb. 1 1922 Inn/51v TOR L0 ENZO H. GREENE Patented Apr. 29, 1924.

UNITED STATES PATENT OFFICE.

Application filed February 1, 1922. Serial 1T0. 588,224.

To all whom it may concern:

Be it known that I, LORENZO H. G a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Couplings for Drill Pipes, of which the following is a specification.

My invention relates to couplings for drill pipes of the character used in by raulic boring, and a purpose of my invention is the provision of a coupling which is constructed to form an additional or subsidiary waterway or port, and a valve controlling the mam and subsidiary water-ways or ports in such manner that the operation of supply;

. ing an additional drill pipe section can readily accomplished without any cessation in the flow of water into the pipe or any reduction in its ressure.

I will descri e one form of coupling embodying my invention and will then point out the novel features thereof in claims.

In the accompanying drawings,

Figure 1 is a view showing in vertical section one form of coupling embodying my invention in applied position between the two sections of a drill pipe.

Figure 2 is a transverse sectional view taken on the line 2-2 and looking in the direction of the arrows.

Referring specifically to the drawings in which similar reference characters refer to similar parts, my invention in its present embodiment comprises a tubular body designated generally at B and including in the present instance a main section 15 and a subsidiary section 16, although it is to be understood that the body may be formed of one piece without departing from the spirit of the invention. The subsidiary section 16.

is provided with an ofi'set collar 17 threaded exteriorly to engage the inner wall of the section 15 and shaped in the same manner as the other end of the section 15. The lower ends .of the section 15 and the section 16 are screw threaded interiorly to receive the confronting ends of two sections of drill pipe D and to thereby serve as a .coupling for connecting the two sections, as will be understood.

The main section 15 is provided at a point between its ends with a water-way or en- ;"trance port 18 adapted to be closed by a screw plug 19, with the walls of the port flanged as indicated at20 to accommodate ened portion 24 the pin The collar 17 is of annular form as clear y shown in Figure 1 and the bore of th1s collar constitutes an entrance ort 21. The lower edge of the collar 17 and t e inner edge of the an e 20 constitute valveseats upon either of w ich is adapted to repose a valve V provided with a pivot car 22 adapted to fit in the recess 23 formed in a thick- I of the section B as clearly shown 1n Figure 2. A pivot pin 25 is extended through suitable openings formed in the thickened portion 24 and the car 22 for pivotally sustaining the ear and consequently the valve so that the latter can move from the position shown in solid lines in Iflgure 1 to the position shown in dotted lines.

In operation, coupling shown in Figure 1 constitute the upper end of a drill pipe to which water is adapted to be supplied from a suitable connectlon to the upper end of the coupling so that it passes downwardly through the drill pipe in eflecting the boring operation. It will be clear that under these conditions the pressure of water operates to maintain the valve V in closing position with respect to the port 18 and in opening position with respect to the port 21. As the boring operat1on proceeds it is of course necessary to add from time to time additional sections of drill pipe, and when adding a section the plug 19 is removed from the port 18 and a water pipe P shown in dash lines in Figure -1 is inserted Within the port 18. The water introduced into'the coupling from this pipe naturally swings the valve V to the dotted line position shown in Figure 1 thereby opening the port 18 and closing the port 21. This water passes downwardly through the drill pipe and operates in the same manner to efi'ect a. hydraulic boring of the well. As the valve V is now in closing position with respect to the port 21, it wi 1 be clear that an additional section of drill pipe can be readily applied to the section 16 and without the necessity of discontinuing the supply of water to the drill pipe. After the pipe section has been added the supply of water again takes Iplace at the top of the coupling, the pipe plug 19 again applied.

Although I have herein shown and described only one form of coupling embodying myinvention, it is to be understood that various changes and modifications may be being removed and the let it be assumed that the Y made herein without departing, from the spirit of the invention and the spirit and see e of the appended claims.

hat I claim is:

1. The combination with sections 01 pipe forming a drill stem, of a con ling adapted to connect two sections of the rill stem and having a side openin and two internal valve seats at right ang es to each other, one in the main line and one for the side openadapted to reing, the said opening being a valve mountceive a water pipe or a plug,

ed in the chamber of the coupling and.

adapted to close either opening so that when a drill pipe section is to be added the plug may be removed and a water pipe connected untilthe drill stem goes down to the extent of a section and then the water fiipe removed and the plu inserted to'a ow the coupling togo on own into the well.

2. A couphng adapted to connect two sections of drill pipes and having aside opening and two mternal valve seats at right angles to each other, one'seat being in the I mam line and the other being for the side opening, the side opening. being adapted to receive a water pipe or a plug, and a valve mounted in the chamber of the coupling and adapted to close either opening.-

In testimony whereof I have signed my name to this s ecification.

iORENZO H. GREENE.

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